"In a year and a half," "China will be sufficiently reunited to allow me to take my trip around the world. I wish to take Madam Wu and an entourage of about thirty persons, engaging expert guides in each country to instruct me in its governmental and industrial methods."
Upton Close (2007). In the Land of the Laughing Buddha – The Adventures of an American Barbarian in China. READ BOOKS. p. 354. ISBN 1-4067-1675-8. Retrieved on 2010-06-28.
"The Military Campaigns of the Kingdom of Wu." "They didn't have any machine guns or airplanes then."Wu Peifu